What type of bonds join the strands of DNA together?

The strands of DNA are held together by hydrogen bonds, which play a crucial role in maintaining the structure of the DNA double helix. Each nucleotide in one strand of DNA pairs specifically with a complementary nucleotide on the opposite strand—adenine pairs with thymine, and cytosine pairs with guanine. These pairings are stabilized by hydrogen bonds, which are relatively weak compared to covalent bonds but are strong enough to hold the two strands together while allowing them to separate during processes like replication and transcription. The weak nature of hydrogen bonds is essential because it enables DNA to unzip easily, facilitating access to the genetic information encoded within. This characteristic is pivotal for the functions of DNA in cellular processes.